Outer or valence electrons
Same elements of group have same valency. They possess same chemical behaviour.
All elements in a group have same chemical properties. They have same number of valence electrons.
All elements in the same A group will have the same number of valence electrons.
All elements in the groups (excluding transition metals) have the same number of electrons as the group number.
Elements with the same number of valence electrons are found in the same group or column of the periodic table. This is because elements in the same group have the same number of valence electrons, which determines their chemical properties. For example, all elements in group 1 have 1 valence electron.
All elements in the same group have the same number of valence electrons.
According to Chemists, the elements of sodium and chlorine belong to the same atomic family as well as carbon and lead.
Copper, gold, and silver are the choices that represent a group of elements with common characteristics. All of these elements are metals.
elements are in the same group since they react similarly to other elements in that group.
Elements in the same group as oxygen are sulfur, selenium, tellurium, and polonium. Group 16 elements are also known as the chalcogens and share similar chemical properties.
elements in a group have the same number of valence electrons
The electron configuration in the outer shell is the same for all of the elements in the same column. This results in some similar chemical properties between these elements in the same group (column).